In this Peruvian Creamy Yellow Pepper Chicken recipe (Aji de Gallina), aji amarillo (yellow pepper) is the star. The pepper has a slightly fruity flavor and is traditionally used in Peruvian sauces and ceviches. Aji de Gallina, a Peruvian national favorite, features shredded chicken bathed in a mildly spicy, creamy, and cheesy yellow pepper sauce. It's both out of this world and familiar at the same time.